OnePlus India — 9R charger not working

I have purchased the 9R mobile last year in the month of August 2021. Now suddenly adopter of 9R got out of order and I m unable to recharge my mobile using the original adopter. I want the problem to be resolved immediately. But customer care says that warranty period is over due to late reporting. my question is how come quality of highly priced product has poor quality which could not be sustained even for year. Please arrange to change the adopter immediately